Luxilon Big Banger ALU Power Spin 127 tennis string is a playable string designed for players who want superior spin potential. It also delivers excellent durability, amazing power and control. An innovative pentagon shape gives you extra bite on the ball. All Big Banger Strings: Give more power. Are very durable. Show no loss of efficiency. Don’t move. Are impervious to atmospheric conditions. As used by Lucie Safarova. Durability: 8 Power: 10 Control: 10 Comfort: 9 It is recommended by Luxilon that you string Big Banger strings at least with 10% less tension than your usual strings.